Shrew runs in through crack (6)
I believe the answer is:
virago
This might be a double definition.
'shrew' is the first definition.
(virago is a kind of shrew)
'runs in through crack' is the second definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
Can you help me to learn more?
(Other definitions for virago that I've seen before include "Loudly fierce or abusive woman" , "A tough abusive woman" , "domineering female" , "Shrew - ill-tempered woman" , "Scold" .)